Abstract
K2Ti4O9, one of layer-structured titanates has ion exchange ability. We have investigated the ion exchange reaction using ion exchange titration. In the region where the amount of potassium in sample is less than hydronium ion from ion exchange resin (phase 1), pH and electric conductivity decreased and in the other region (phase 2) pH and electric conductivity increased slowly. This result showed not only ion exchange reaction but also another reaction occurred in the phase 1 and hydronium ion from ion exchange resin dominated the reaction in the phase 2.
